Key Takeaways

Kylie Jenner gave Kendall a quick kiss on the lips during her 31st birthday celebration after Kendall asked, “kiss me,” and both sisters burst into laughter.

Khloé Kardashian shared the clip on Instagram on Nov. 4 alongside a birthday tribute celebrating Kendall’s growth and independence.

Kylie also posted throwback photos with Kendall, writing, “I am who I am because of who you've been to me,” and calling her a “forever sister.”

Kendall Jenner got a birthday peck from sister Kylie Jenner while celebrating Kendall's 31st birthday.

The moment between the sisters was captured in a video filmed during a nighttime gathering. Kendall can be heard asking her younger sister to "kiss me," prompting Kylie, 29, to lean in and give her a quick peck on the lips.

The two immediately burst into laughter following the brief exchange.

It was their older sister Khloé Kardashian who posted the footage to her Instagram on Wednesday (Nov. 4), one day after Kendall's birthday. By Thursday (Nov.…